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Re: Wierd context-switching issue on Xeon patch for 7.4.1

From: Josh Berkus <josh(at)agliodbs(dot)com>
To: pg(at)fastcrypt(dot)com, Tom Lane <tgl(at)sss(dot)pgh(dot)pa(dot)us>
Cc: pgsql-performance(at)postgresql(dot)org
Subject: Re: Wierd context-switching issue on Xeon patch for 7.4.1
Date: 2004-04-27 00:03:25
Message-ID: 200404261703.25631.josh@agliodbs.com (view raw or flat)
Thread:
Lists: pgsql-performance
Dave,

> Yeah, I did some more testing myself, and actually get better numbers
> with increasing spins per delay to 1000, but my suspicion is that it is
> highly dependent on finding the right delay for the processor you are
> on.

Well, it certainly didn't help here:

procs                      memory      swap          io     system         cpu
 r  b   swpd   free   buff  cache   si   so    bi    bo   in    cs us sy id wa
 2  0      0 14870744 123872 1129912    0    0     0     0 1027 187341 48 27 
26  0
 2  0      0 14869912 123872 1129912    0    0     0    48 1030 126490 65 18 
16  0
 2  0      0 14867032 123872 1129912    0    0     0     0 1021 106046 72 16 
12  0
 2  0      0 14869912 123872 1129912    0    0     0     0 1025 90256 76 14 10  
0
 2  0      0 14870424 123872 1129912    0    0     0     0 1022 135249 63 22 
16  0
 2  0      0 14872664 123872 1129912    0    0     0     0 1023 131111 63 20 
17  0
 1  0      0 14871128 123872 1129912    0    0     0    48 1024 155728 57 22 
20  0
 2  0      0 14871128 123872 1129912    0    0     0     0 1028 189655 49 29 
22  0
 2  0      0 14871064 123872 1129912    0    0     0     0 1018 190744 48 29 
23  0
 2  0      0 14871064 123872 1129912    0    0     0     0 1027 186812 51 26 
23  0


-- 
-Josh Berkus
 Aglio Database Solutions
 San Francisco


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Next:From: Dave CramerDate: 2004-04-27 00:16:00
Subject: Re: Wierd context-switching issue on Xeon patch for 7.4.1
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Subject: Re: [JDBC] is a good practice to create an index on the oid?

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